行列转换

 1 /****** Object:  Table [dbo].[Table_1]    Script Date: 08/06/2013 13:55:39 ******/
 2 /*行列转换*/
 3
 4 SET ANSI_NULLS ON
 5 GO
 6
 7 SET QUOTED_IDENTIFIER ON
 8 GO
 9
10 SET ANSI_PADDING ON
11 GO
12
13 /*对临时表无效*/
14 IF OBJECT_ID (‘#Table_1‘, ‘U‘) IS NOT NULL
15    DROP TABLE #Table_1;
16
17 CREATE TABLE #Table_1(
18     [name] [varchar](50) NOT NULL,
19     [score] [real] NOT NULL,
20     [subject_id] [int] NOT NULL
21 ) ON [PRIMARY]
22
23 insert into #Table_1 ([name],[score],[subject_id]) values(  ‘a‘    ,   90  ,   1   );
24 insert into #Table_1 ([name],[score],[subject_id]) values(  ‘b‘    ,   80  ,   2   );
25 insert into #Table_1 ([name],[score],[subject_id]) values(  ‘c‘    ,   70  ,   3   );
26 insert into #Table_1 ([name],[score],[subject_id]) values(  ‘d‘    ,   50  ,   1   );
27 insert into #Table_1 ([name],[score],[subject_id]) values(  ‘e‘    ,   40  ,   2   );
28 insert into #Table_1 ([name],[score],[subject_id]) values(  ‘f‘    ,   60  ,   1   );
29
30 --显示1
31
32 SELECT [name],[1],[2],[3]
33 FROM #Table_1
34 pivot
35 (
36   sum(score) for subject_id in ([1],[2],[3])
37 ) as pvt
38
39 select * from #Table_1
40
41 --显示2
42
43 SELECT [name],[subject_id],[score]
44 FROM
45 (
46     SELECT [name],[1],[2],[3]
47     FROM #Table_1
48     pivot
49     (
50       sum(score) for subject_id in ([1],[2],[3])
51     ) as pvt
52 ) p
53 unpivot
54 (
55     score for subject_id in([1],[2],[3])
56 ) as unpvt